66416533523 has 2 divisors, whose sum is σ = 66416533524. Its totient is φ = 66416533522.

The previous prime is 66416533481. The next prime is 66416533549. The reversal of 66416533523 is 32533561466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66416533523 - 2⁶ = 66416533459 is a prime.

It is a super-2 number, since 2×66416533523² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66416533223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33208266761 + 33208266762.

It is an arithmetic number, because the mean of its divisors is an integer number (33208266762).

Almost surely, 2^66416533523 is an apocalyptic number.

66416533523 is a deficient number, since it is larger than the sum of its proper divisors (1).

66416533523 is an equidigital number, since it uses as much as digits as its factorization.

66416533523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 44.

The spelling of 66416533523 in words is "sixty-six billion, four hundred sixteen million, five hundred thirty-three thousand, five hundred twenty-three".